Finding the Fourth Proportional to 90,993.16, 136,544.82 and 31,872.88

Step by Step Solution

1. Step 1: Write the proportion equation
   90,993.16 : 136,544.82 = 31,872.88 : x
2. Step 2: Convert to fraction form
   90,993.16/136,544.82 = 31,872.88/x
3. Step 3: Cross multiply
   90,993.16x = 136,544.82 × 31,872.88
4. Step 4: Simplify right side
   90,993.16x = 4,352,076,662.48
5. Step 5: Solve for x
   x = 4,352,076,662.48/90,993.16
6. Step 6: Final answer
   x = 47,828.61